Pumping apparatus



b 1929. I D. J. EASTHAM 1,728,959

' PUMPING APPARATUS Filed March 4, 1926 3 sheets-'shet 1 BY yflM ATTORNEY.

Sept. 24, 1929.

D. J. EAST'H'AM Q 1,728,959

PUMP ING APPARATU S 5 Sheets-Sheet 3 Filed March 4, 1926 INVENTOR.

WW4 TTORNEY.

Patented Sept. 24, 1929 PATENT OFFICE v DANIEL J. EASTHAM, OF ELDORADO, KANSAS PUMPING APIBARATUS Application filed March 4, 1926. Serial No. 92,312.

This invention relates to pumping apparatus for oil wells and the like, and has more particular reference to an improved mechanism for effecting reciprocation of the polish rod of a well pump or the like.

The primary object of the invention is to provide a polish rod reciprocating mechanism of the above kind, by means of which the polish rod may be given a stroke of maximum length in a most desirable manner.

, A further object is to provide a polish rod reciprocating mechanism of the above character which is extremely simple and durable in construction as well as eflicient in operation.

In carrying out the above objects I provide a lever operatively connected to the pol- 1Sl1 rod and means for causing the lever to bodily reciprocate in a path parallel with the polish rod and to simultaneously cause said lever to swing in the same direction in.

stood, and the same consists in the novel form,

combination and arrangement of parts hereinafter more fully described, shown in theaccompanying drawings, and claimed.

In the drawings, wherein like reference characters indicate corresponding throughout the several views.

Figure 1 is a side elevational view of a polish rod actuating mechanism constructed in accordance with the present invention and in operative relation to the polish rod and easing head of an oil well pump;

Figure 2 is a top plan view of the device shown in Figure 1;

Figure 3 is a horizontal sect-ion taken substantially upon line 33 of Figure 1 Figure 4 is a horizontal section taken upon 7 line 44 of Figure 1;

Figure 5 is a vertical section taken upon line 5-5 of Flgure l; and

parts ward the upper arms of the levers 11 ar- Figure 6 is a vertical section taken upon line 6-6 of Figure 1.

Referring more in detail to the drawings, 5 indicates the casing head of an oil well pump, and 6 indicates the usual polish rod which reciprocates through and projects some distance above the top of the casing head so as to be reciprocated for actuating the pump plunger, not shown. In the embodiment of theinvention illustrated, there are provided a pair of spaced parallel foundation beams 7 which are disposed at opposite sides of the casing head 5 and upon the surface of the ground so that said foundation beams project to one side of the casing head 5 for a greater distance than to the other side thereof. A link 8 is pivoted as at 9 at its lower end to the forward end portion of each foundation beam 7, and a similar link 8' is similarly pivoted to each beam 7 rearwardly of the casing head 5,

and pivotally connected as at 10 at its lower end to each of the four links 8 and 8 is a lever 11. The intermediate portions of the levers 11 connected to the links 8 and 8 of each foundation beam 7 are pivoted to the ends of a rigid bar or connecting link 12, whereby the levers may swing vertically or in a plane parallel with the path of movement of the polish rod 6 while at the same time being prevented from bodily moving toward or away from each other. The levers 11 are preferably formed of angularly related arms rigidly maintained in permanent angular relation by braces 13 so as to substantially constitute bell crank levers, and the upper arms of the levers 13 forwardly of the casing head 5 project toranged rearwardly of said casing head, whereby the upper ends of all of the levers 11 terminate in adjacent relation and adjacent to the upper end of the polish rod 6. These adjacent upper ends of the levers 11 are operatively connected to the upper end of the polish rod 6 by means of a block 14 through which the polish rod projects and in which it issecured, and pairs of arms 15 suitably fastened to the sides of the block 14 and respectively projecting upwardly and pivoted to the adjacent end of the levers 11.

From the above, it will be seen that the sumption of power.

lower arms of the levers 11 and the attached links 8 and 8 form toggle joints which, when alternately and rapidly broken outwardly or away from the casing head 5 and then straightened as respectively indicated by dotted and full lines in Figure 1, will cause reciprocation of the levers 11 bodily in planes parallel with the path of movement of the polish rod 6, and at the same time cause swinging movement of the levers 11 about their intermediate pivots in a plane parallel with the path of movement of the polish rod 6 whereby the latter is given a relatively long stroke in each direction with aminimum con- It will also be noted that the-levers 11 are swung so that their upper arms which are connected to' the polish rod 6'movc or swing in the same direction in which such levers are being bodily moved,

the upper arms of the levers 11 swinging upwardly past the links 12 when the toggle joints are straightened, and swinging past ,and below the links 12 as indicated by dotted I lines in Figure 1 when the toggle joints are broken. The specific embodiment of the invention illustrated involving the above particular arrangement of four toggle-joints provides a mechanism which is well balanced and therefore eflicient'and durable. However, it is to be understood that the invention contemplates reduction of the number of levers and toggle joints employed if found desirable, and principally resides in the provision of a lever operatively connected to the polish forward ends are pivota rod and associated with means for causing the-same to bodily reciproeate'and simultaneously swing back and forth in'a plane parallel with the polish rod.

For the purpose of'breaking and straightening the toggle oints, I preferably provide a pair of relatively lon pitmen' 16 whose Iy engaged with the respective pivotal connections 10 of the forward toggle joints, and a further shorter pair of pitmen 17 whose forward ends are pivotally engaged with the pivotal connec tions 10 of the rear toggle joints, the rear ends of the pitmen 16 being pivotally connected to the upper end of a vertically swinging lever 18 which is pivotally mounted upon a horizontal axis. intermediate its ends and which-has the rear ends of the pitmen 17 pivoted to the lower end thereof. Itis thusapparent that by connecting a power line 19 'to the lever 18, the actuation of the toggle joints can be accomplishechthe forward toggle joint breaking forwardly, and the reartoggle joint breaking rearwa'rdly as shown by dotted lines in Figure 1, respectively under the actuating influence of the pitmen '16 and the pitmen 17. As shown, .a post 20 is rigidly mounted upon therear end of each foundation beam 7 and issuitablybra'ced [relative to the latter as at 21, the lever 18 being pivotally supported between the postsQO as at 22,

As the various steps of operation have been dealt with as the detailed description progressed, it is believed that the construction and operation as well as the advantages of the present invention will be readily understood and appreciated without further detail description thereof.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

What I claim as new is 1.. In a well pumping apparatus, a mechanism for actuating a reciprocating polished rod including a pair of opposed bell crank shaped levers each pivoted at its angle, means operatively connecting the outer end of the upper arm-of each lever to said polish rod, and means for bodily moving the'lever in. a plane parallel with "the polish rod and simultaneously swinging each lever in a similar plane and in the same direction in'which the lever is being bodily moved.

2; In a well pumping apparatus, a mechanism for actuating a reciprocating polish rod including a pair of opposed bell crank shaped levers each pivoted at its angle, means operatively connecting the outer end of the upper arm of each lever to said polish rod, and means'for bodily moving the lever in a plane parallel with the polish rod and simultaneously swinging eachlever in a-similarplane and in the same direction in which the lever is being bodily moved, said last named means embodying a toggle jointincluding the lower arm of said lever, and means for alternately breaking and straightening said toggle joint in rapid succession.

its lower end. to the base at one side ofthe polish rod, a lever pivotally connectedatits lower end to the upper end of said link, means to operatively connect the-other end of said lever to the upper end of the polish rod, means to successively and alternately break and straighten the toggle joint formed by said link and the adjacent arm of said'leveryand means permitting the lever to swing in a plane parallel with the polishrod; and for causing the lever to reciprocate ina similar plane as the toggle joint is broken and straightened, said'l'ast namedmeans comprising another toggle' joint arranged at the opposite side ofthe polish rodandmeans connecting the intermediate, portion of the 'lever 4. In combination with a vertically reciprocable polish rod, a base, a link pivoted at its lower end to the base at one side of the polish rod, a lever pivotally connected at its lower end to the upper end of said link, means to operatively connect the other end of said lever to the upper end of the polish rod, means to successively and alternately break and straighten the toggle joint formed by said link and the adjacent arm of said lever, and means permitting the lever to swing in a plane parallel with the polish rod and for causing the lever to reciprocate in a similar plane as the toggle joint is broken and 1 straightened, said last named means comprising another toggle joint arranged at the opposite side of the polish rod and means connecting the intermediate portion of the lever of the last named toggle oint with the first named toggle joint lever so as to prevent relative movement of the levers toward or away from each other in directions laterally of the polish rod, and means to simultaneously break the second named toggle joint when the first named toggle joint is broken and to straighten said second named toggle joint when the first named toggle joint is straightened, said last named and first named toggle joint breaking and straightening means comprising pitmen operatively connected to the respective toggle joints and an actuating lever having said respective pitmen connected to opposite ends thereof.

In testimony whereof I affix my signature.

DANIEL J. EASTHAM. 

